Grosse Pointe/Detroit is the boundary perhaps most emblematic of the divide between affluent white suburbs and the African-American urban core of Detroit.

Gross Pointe was, and still is, a wealthy enclave bordering Lake St. Clair. Houses are large and expensive, the asphalt smooth, the lawns nicely manicured. The projected reputation of the area was a carefully managed strategy, as evidenced by the discovery in 1960 of the "Grosse Pointe System", a ranking system developed by the community to be carried out on prospective home buyers (rankings were based on complexion, religion, "way of living" and "reputation"). Blacks, Mexicans, and people of "Oriental descent" were not even considered.
The westernmost section is known as "Grosse Pointe Park", separated from Detroit by one two-lane road: Alter Road.

Alter Road has a long strange history of spatial segregation which continues to this day. For example, many roads which lead from Detroit to Grosse Pointe and cross Alter Road have just been walled off completely, including Goethe, Brooks, and Korte. Other roads, such as Kercheval, have been famously re-engineered (currently a narrow roundabout exists with a large steel sculpture in the middle, but previously it was blockaded multiple times by gigantic planters, sheds for a farmer's market (facing towards Grosse Pointe), and mounds of snow. That's not the only boundary road, either. To the north, Mack Avenue does the same thing, with the same blockades (Wayburn, Grayton, and multiple alleyways) and traffic diversions (Somerset, Beaconsfield).

The divide between Grosse Pointe Park and Detroit has been featured many times in many other excellent photo projects, including The Other America, and that Martin Luther King even gave a speech there in 1968 decrying the racial and economic imbalance of the neighborhoods (this was three weeks before his assassination, and only months after the Detroit Riots). It's also worthwhile to note that Jefferson Chalmers itself is undergoing something of a renaissance, and there are large gated communities wholly within Detroit which have perpetuated road closures and fenced-off access to the surrounding community just as dramatically.